git.sur5r.net Git - openldap/blob - servers/slapd/back-meta/bind.c

   1 /* $OpenLDAP$ */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 1999-2006 The OpenLDAP Foundation.
   5  * Portions Copyright 2001-2003 Pierangelo Masarati.
   6  * Portions Copyright 1999-2003 Howard Chu.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted only as authorized by the OpenLDAP
  11  * Public License.
  12  *
  13  * A copy of this license is available in the file LICENSE in the
  14  * top-level directory of the distribution or, alternatively, at
  15  * <http://www.OpenLDAP.org/license.html>.
  16  */
  17 /* ACKNOWLEDGEMENTS:
  18  * This work was initially developed by the Howard Chu for inclusion
  19  * in OpenLDAP Software and subsequently enhanced by Pierangelo
  20  * Masarati.
  21  */
  22
  23 #include "portable.h"
  24
  25 #include <stdio.h>
  26
  27 #include <ac/errno.h>
  28 #include <ac/socket.h>
  29 #include <ac/string.h>
  30
  31
  32 #define AVL_INTERNAL
  33 #include "slap.h"
  34 #include "../back-ldap/back-ldap.h"
  35 #include "back-meta.h"
  36
  37 static LDAP_REBIND_PROC meta_back_default_rebind;
  38
  39 /*
  40  * a module could register a replacement for this function
  41  */
  42 LDAP_REBIND_PROC        *meta_back_rebind_f = meta_back_default_rebind;
  43
  44 static int
  45 meta_back_single_bind(
  46         Operation               *op,
  47         SlapReply               *rs,
  48         metaconn_t              *mc,
  49         int                     candidate,
  50         int                     massage );
  51
  52 int
  53 meta_back_bind( Operation *op, SlapReply *rs )
  54 {
  55         metainfo_t      *mi = ( metainfo_t * )op->o_bd->be_private;
  56         metaconn_t      *mc = NULL;
  57
  58         int             rc = LDAP_OTHER,
  59                         i,
  60                         gotit = 0,
  61                         isroot = 0;
  62
  63         SlapReply       *candidates = meta_back_candidates_get( op );
  64
  65         rs->sr_err = LDAP_SUCCESS;
  66
  67         Debug( LDAP_DEBUG_ARGS, "%s meta_back_bind: dn=\"%s\".\n",
  68                 op->o_log_prefix, op->o_req_dn.bv_val, 0 );
  69
  70         /* the test on the bind method should be superfluous */
  71         if ( op->orb_method == LDAP_AUTH_SIMPLE
  72                 && be_isroot_dn( op->o_bd, &op->o_req_ndn ) )
  73         {
  74                 if ( !be_isroot_pw( op ) ) {
  75                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
  76                         rs->sr_text = NULL;
  77                         send_ldap_result( op, rs );
  78                         return rs->sr_err;
  79                 }
  80
  81                 if ( META_BACK_DEFER_ROOTDN_BIND( mi ) ) {
  82                         rs->sr_err = LDAP_SUCCESS;
  83                         rs->sr_text = NULL;
  84                         /* frontend will return success */
  85                         return rs->sr_err;
  86                 }
  87
  88                 isroot = 1;
  89         }
  90
  91         /* we need meta_back_getconn() not send result even on error,
  92          * because we want to intercept the error and make it
  93          * invalidCredentials */
  94         mc = meta_back_getconn( op, rs, NULL, LDAP_BACK_BIND_SERR );
  95         if ( !mc ) {
  96                 char    buf[ SLAP_TEXT_BUFLEN ];
  97
  98                 snprintf( buf, sizeof( buf ),
  99                         "meta_back_bind: no target "
 100                         "for dn \"%s\" (%d%s%s).",
 101                         op->o_req_dn.bv_val, rs->sr_err,
 102                         rs->sr_text ? ". " : "",
 103                         rs->sr_text ? rs->sr_text : "" );
 104                 Debug( LDAP_DEBUG_ANY,
 105                         "%s %s\n",
 106                         op->o_log_prefix, buf, 0 );
 107
 108                 /* FIXME: there might be cases where we don't want
 109                  * to map the error onto invalidCredentials */
 110                 switch ( rs->sr_err ) {
 111                 case LDAP_NO_SUCH_OBJECT:
 112                 case LDAP_UNWILLING_TO_PERFORM:
 113                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 114                         rs->sr_text = NULL;
 115                         break;
 116                 }
 117                 send_ldap_result( op, rs );
 118                 return rs->sr_err;
 119         }
 120
 121         /*
 122          * Each target is scanned ...
 123          */
 124         mc->mc_authz_target = META_BOUND_NONE;
 125         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 126                 int             lerr;
 127                 Operation       op2 = *op;
 128                 int             massage = 1;
 129
 130                 /*
 131                  * Skip non-candidates
 132                  */
 133                 if ( candidates[ i ].sr_tag != META_CANDIDATE ) {
 134                         continue;
 135                 }
 136
 137                 if ( gotit == 0 ) {
 138                         /* set rc to LDAP_SUCCESS only if at least
 139                          * one candidate has been tried */
 140                         rc = LDAP_SUCCESS;
 141                         gotit = 1;
 142
 143                 } else if ( isroot == 0 ) {
 144                         /*
 145                          * A bind operation is expected to have
 146                          * ONE CANDIDATE ONLY!
 147                          */
 148                         Debug( LDAP_DEBUG_ANY,
 149                                 "### %s meta_back_bind: more than one"
 150                                 " candidate selected...\n",
 151                                 op->o_log_prefix, 0, 0 );
 152                 }
 153
 154                 if ( isroot ) {
 155                         if ( BER_BVISNULL( &mi->mi_targets[ i ].mt_pseudorootdn ) )
 156                         {
 157                                 metasingleconn_t        *msc = &mc->mc_conns[ i ];
 158
 159                                 /* skip the target if no pseudorootdn is provided */
 160                                 if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 161                                         ch_free( msc->msc_bound_ndn.bv_val );
 162                                         BER_BVZERO( &msc->msc_bound_ndn );
 163                                 }
 164
 165                                 if ( LDAP_BACK_SAVECRED( mi ) &&
 166                                         !BER_BVISNULL( &msc->msc_cred ) )
 167                                 {
 168                                         /* destroy sensitive data */
 169                                         memset( msc->msc_cred.bv_val, 0,
 170                                                 msc->msc_cred.bv_len );
 171                                         ch_free( msc->msc_cred.bv_val );
 172                                         BER_BVZERO( &msc->msc_cred );
 173                                 }
 174
 175                                 continue;
 176                         }
 177
 178                         op2.o_req_dn = mi->mi_targets[ i ].mt_pseudorootdn;
 179                         op2.o_req_ndn = mi->mi_targets[ i ].mt_pseudorootdn;
 180                         op2.orb_cred = mi->mi_targets[ i ].mt_pseudorootpw;
 181                         op2.orb_method = LDAP_AUTH_SIMPLE;
 182
 183                         massage = 0;
 184                 }
 185
 186                 lerr = meta_back_single_bind( &op2, rs, mc, i, massage );
 187
 188                 if ( lerr != LDAP_SUCCESS ) {
 189                         rc = rs->sr_err = lerr;
 190                         candidates[ i ].sr_tag = META_NOT_CANDIDATE;
 191                         break;
 192                 }
 193         }
 194
 195         /* must re-insert if local DN changed as result of bind */
 196         if ( rc == LDAP_SUCCESS ) {
 197                 if ( isroot ) {
 198                         mc->mc_authz_target = META_BOUND_ALL;
 199                         ber_dupbv( &op->orb_edn, be_root_dn( op->o_bd ) );
 200                 }
 201
 202                 if ( !dn_match( &op->o_req_ndn, &mc->mc_local_ndn ) ) {
 203                         int             lerr;
 204
 205                         /* wait for all other ops to release the connection */
 206 retry_lock:;
 207                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 208                         if ( mc->mc_refcnt > 1 ) {
 209                                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 210                                 ldap_pvt_thread_yield();
 211                                 goto retry_lock;
 212                         }
 213
 214                         assert( mc->mc_refcnt == 1 );
 215                         mc = avl_delete( &mi->mi_conninfo.lai_tree, (caddr_t)mc,
 216                                 meta_back_conn_cmp );
 217                         assert( mc != NULL );
 218
 219                         ber_bvreplace( &mc->mc_local_ndn, &op->o_req_ndn );
 220                         lerr = avl_insert( &mi->mi_conninfo.lai_tree, (caddr_t)mc,
 221                                 meta_back_conn_cmp, meta_back_conn_dup );
 222                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 223                         if ( lerr == -1 ) {
 224                                 for ( i = 0; i < mi->mi_ntargets; ++i ) {
 225                                         if ( mc->mc_conns[ i ].msc_ld != NULL ) {
 226                                                 meta_clear_one_candidate( &mc->mc_conns[ i ] );
 227                                         }
 228                                 }
 229
 230                                 /* we can do this because mc_refcnt == 1 */
 231                                 mc->mc_refcnt = 0;
 232                                 meta_back_conn_free( mc );
 233                                 mc = NULL;
 234                         }
 235                 }
 236         }
 237
 238         if ( mc != NULL ) {
 239                 meta_back_release_conn( op, mc );
 240         }
 241
 242         /*
 243          * rc is LDAP_SUCCESS if at least one bind succeeded,
 244          * err is the last error that occurred during a bind;
 245          * if at least (and at most?) one bind succeeds, fine.
 246          */
 247         if ( rc != LDAP_SUCCESS ) {
 248
 249                 /*
 250                  * deal with bind failure ...
 251                  */
 252
 253                 /*
 254                  * no target was found within the naming context,
 255                  * so bind must fail with invalid credentials
 256                  */
 257                 if ( rs->sr_err == LDAP_SUCCESS && gotit == 0 ) {
 258                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 259                 } else {
 260                         rs->sr_err = slap_map_api2result( rs );
 261                 }
 262                 send_ldap_result( op, rs );
 263                 return rs->sr_err;
 264
 265         }
 266
 267         return LDAP_SUCCESS;
 268 }
 269
 270 /*
 271  * meta_back_single_bind
 272  *
 273  * attempts to perform a bind with creds
 274  */
 275 static int
 276 meta_back_single_bind(
 277         Operation               *op,
 278         SlapReply               *rs,
 279         metaconn_t              *mc,
 280         int                     candidate,
 281         int                     massage )
 282 {
 283         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 284         metatarget_t            *mt = &mi->mi_targets[ candidate ];
 285         struct berval           mdn = BER_BVNULL;
 286         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 287         int                     msgid,
 288                                 rebinding = 0;
 289
 290
 291         if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 292                 ch_free( msc->msc_bound_ndn.bv_val );
 293                 BER_BVZERO( &msc->msc_bound_ndn );
 294         }
 295
 296         if ( LDAP_BACK_SAVECRED( mi ) && !BER_BVISNULL( &msc->msc_cred ) ) {
 297                 /* destroy sensitive data */
 298                 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
 299                 ch_free( msc->msc_cred.bv_val );
 300                 BER_BVZERO( &msc->msc_cred );
 301         }
 302
 303         /*
 304          * Rewrite the bind dn if needed
 305          */
 306         if ( massage ) {
 307                 dncookie                dc;
 308
 309                 dc.target = mt;
 310                 dc.conn = op->o_conn;
 311                 dc.rs = rs;
 312                 dc.ctx = "bindDN";
 313
 314                 if ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) {
 315                         send_ldap_result( op, rs );
 316                         return -1;
 317                 }
 318
 319         } else {
 320                 mdn = op->o_req_dn;
 321         }
 322
 323         /* FIXME: this fixes the bind problem right now; we need
 324          * to use the asynchronous version to get the "matched"
 325          * and more in case of failure ... */
 326         /* FIXME: should we check if at least some of the op->o_ctrls
 327          * can/should be passed? */
 328 rebind:;
 329         rs->sr_err = ldap_sasl_bind( msc->msc_ld, mdn.bv_val,
 330                         LDAP_SASL_SIMPLE, &op->orb_cred,
 331                         op->o_ctrls, NULL, &msgid );
 332         if ( rs->sr_err == LDAP_SUCCESS ) {
 333                 LDAPMessage     *res;
 334                 struct timeval  tv;
 335                 int             rc;
 336                 int             nretries = mt->mt_nretries;
 337                 char            buf[ SLAP_TEXT_BUFLEN ];
 338
 339                 LDAP_BACK_TV_SET( &tv );
 340
 341                 /*
 342                  * handle response!!!
 343                  */
 344 retry:;
 345                 switch ( ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res ) ) {
 346                 case 0:
 347                         snprintf( buf, sizeof( buf ),
 348                                 "ldap_result=0 nretries=%d%s\n",
 349                                 nretries, rebinding ? " rebinding" : "" );
 350                         Debug( LDAP_DEBUG_ANY,
 351                                 "%s meta_back_single_bind[%d]: %s.\n",
 352                                 op->o_log_prefix, candidate, buf );
 353
 354                         if ( nretries != META_RETRY_NEVER ) {
 355                                 ldap_pvt_thread_yield();
 356                                 if ( nretries > 0 ) {
 357                                         nretries--;
 358                                 }
 359                                 tv = mt->mt_bind_timeout;
 360                                 goto retry;
 361                         }
 362                         rs->sr_err = LDAP_BUSY;
 363                         if ( rebinding ) {
 364                                 ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 365                                 break;
 366                         }
 367
 368                         /* FIXME: some times the request times out
 369                          * while the other party is not willing to
 370                          * send a response any more.  Give it a second
 371                          * chance with a freshly bound connection */
 372                         rebinding = 1;
 373                         nretries = mt->mt_nretries;
 374                         /* fallthru */
 375
 376                 case -1:
 377                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER,
 378                                         &rs->sr_err );
 379
 380                         if ( rebinding ) {
 381                                 ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 382                         }
 383
 384                         snprintf( buf, sizeof( buf ),
 385                                 "err=%d nretries=%d",
 386                                 rs->sr_err, nretries );
 387                         Debug( LDAP_DEBUG_ANY,
 388                                 "### %s meta_back_single_bind[%d]: %s.\n",
 389                                 op->o_log_prefix, candidate, buf );
 390
 391                         rc = slap_map_api2result( rs );
 392                         if ( rs->sr_err == LDAP_UNAVAILABLE && nretries != META_RETRY_NEVER ) {
 393                                 rc = meta_back_retry( op, rs, mc, candidate, LDAP_BACK_DONTSEND );
 394                                 if ( rc ) {
 395                                         if ( nretries > 0 ) {
 396                                                 nretries--;
 397                                         }
 398                                         ldap_pvt_thread_yield();
 399                                         goto rebind;
 400                                 }
 401                         }
 402                         break;
 403
 404                 default:
 405                         rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 406                                         NULL, NULL, NULL, NULL, 1 );
 407                         if ( rc != LDAP_SUCCESS ) {
 408                                 rs->sr_err = rc;
 409                         }
 410                         break;
 411                 }
 412         }
 413
 414         if ( rs->sr_err != LDAP_SUCCESS ) {
 415                 rs->sr_err = slap_map_api2result( rs );
 416                 goto return_results;
 417         }
 418
 419         ber_bvreplace( &msc->msc_bound_ndn, &op->o_req_dn );
 420         LDAP_BACK_CONN_ISBOUND_SET( msc );
 421         mc->mc_authz_target = candidate;
 422
 423         if ( LDAP_BACK_SAVECRED( mi ) ) {
 424                 ber_bvreplace( &msc->msc_cred, &op->orb_cred );
 425                 ldap_set_rebind_proc( msc->msc_ld, meta_back_rebind_f, msc );
 426         }
 427
 428         if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED
 429                         && op->o_req_ndn.bv_len != 0 )
 430         {
 431                 ( void )meta_dncache_update_entry( &mi->mi_cache,
 432                                 &op->o_req_ndn, candidate );
 433         }
 434
 435 return_results:;
 436         if ( mdn.bv_val != op->o_req_dn.bv_val ) {
 437                 free( mdn.bv_val );
 438         }
 439
 440         return rs->sr_err;
 441 }
 442
 443 /*
 444  * meta_back_single_dobind
 445  */
 446 int
 447 meta_back_single_dobind(
 448         Operation               *op,
 449         SlapReply               *rs,
 450         metaconn_t              *mc,
 451         int                     candidate,
 452         ldap_back_send_t        sendok,
 453         int                     nretries,
 454         int                     dolock )
 455 {
 456         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 457         metatarget_t            *mt = &mi->mi_targets[ candidate ];
 458         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 459         int                     rc;
 460         static struct berval    cred = BER_BVC( "" );
 461         int                     msgid,
 462                                 rebinding = 0,
 463                                 save_nretries = nretries;
 464
 465         assert( !LDAP_BACK_CONN_ISBOUND( msc ) );
 466
 467         /*
 468          * Otherwise an anonymous bind is performed
 469          * (note: if the target was already bound, the anonymous
 470          * bind clears the previous bind).
 471          */
 472         if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 473                 ber_memfree( msc->msc_bound_ndn.bv_val );
 474                 BER_BVZERO( &msc->msc_bound_ndn );
 475         }
 476
 477         if ( LDAP_BACK_SAVECRED( mi ) && !BER_BVISNULL( &msc->msc_cred ) ) {
 478                 /* destroy sensitive data */
 479                 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
 480                 ber_memfree( msc->msc_cred.bv_val );
 481                 BER_BVZERO( &msc->msc_cred );
 482         }
 483
 484         /* FIXME: should we check if at least some of the op->o_ctrls
 485          * can/should be passed? */
 486 rebind:;
 487         rc = ldap_sasl_bind( msc->msc_ld, "", LDAP_SASL_SIMPLE, &cred,
 488                         NULL, NULL, &msgid );
 489         if ( rc == LDAP_SUCCESS ) {
 490                 LDAPMessage     *res;
 491                 struct timeval  tv;
 492                 char            buf[ SLAP_TEXT_BUFLEN ];
 493
 494                 LDAP_BACK_TV_SET( &tv );
 495
 496                 /*
 497                  * handle response!!!
 498                  */
 499 retry:;
 500                 switch ( ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res ) ) {
 501                 case 0:
 502                         snprintf( buf, sizeof( buf ),
 503                                 "ldap_result=0 nretries=%d%s",
 504                                 nretries, rebinding ? " rebinding" : "" );
 505                         Debug( LDAP_DEBUG_ANY,
 506                                 "%s meta_back_single_dobind[%d]: %s.\n",
 507                                 op->o_log_prefix, candidate, buf );
 508
 509                         if ( nretries != META_RETRY_NEVER ) {
 510                                 ldap_pvt_thread_yield();
 511                                 if ( nretries > 0 ) {
 512                                         nretries--;
 513                                 }
 514                                 tv = mt->mt_bind_timeout;
 515                                 goto retry;
 516                         }
 517
 518                         rc = LDAP_BUSY;
 519                         if ( rebinding ) {
 520                                 ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 521                                 break;
 522                         }
 523
 524                         /* FIXME: some times the request times out
 525                          * while the other party is not willing to
 526                          * send a response any more.  Give it a second
 527                          * chance with a freshly bound connection */
 528                         rebinding = 1;
 529                         nretries = save_nretries;
 530                         /* fallthru */
 531
 532                 case -1:
 533                         ldap_get_option( msc->msc_ld,
 534                                         LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
 535
 536                         if ( rebinding ) {
 537                                 ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 538                         }
 539
 540                         snprintf( buf, sizeof( buf ),
 541                                 "err=%d nretries=%d",
 542                                 rs->sr_err, nretries );
 543                         Debug( LDAP_DEBUG_ANY,
 544                                 "### %s meta_back_single_dobind[%d]: %s.\n",
 545                                 op->o_log_prefix, candidate, buf );
 546
 547                         rc = slap_map_api2result( rs );
 548                         if ( rc == LDAP_UNAVAILABLE && nretries != META_RETRY_NEVER ) {
 549                                 /* NOTE: we do not use meta_back_retry() here
 550                                  * to avoid circular loops; mc_mutex is set
 551                                  * by the caller */
 552                                 if ( dolock ) {
 553                                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 554                                 }
 555
 556                                 if ( mc->mc_refcnt == 1 ) {
 557                                         meta_clear_one_candidate( msc );
 558                                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
 559
 560                                         ( void )rewrite_session_delete( mt->mt_rwmap.rwm_rw, op->o_conn );
 561
 562                                         /* mc here must be the regular mc,
 563                                          * reset and ready for init */
 564                                         rc = meta_back_init_one_conn( op, rs,
 565                                                 mt, mc, candidate,
 566                                                 LDAP_BACK_CONN_ISPRIV( mc ),
 567                                                 LDAP_BACK_DONTSEND );
 568
 569                                 } else {
 570                                         /* can't do anything about it */
 571                                         rc = LDAP_UNAVAILABLE;
 572                                 }
 573
 574                                 if ( dolock ) {
 575                                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 576                                 }
 577
 578                                 if ( rc == LDAP_SUCCESS ) {
 579                                         ldap_pvt_thread_yield();
 580                                         if ( nretries > 0 ) {
 581                                                 nretries--;
 582                                         }
 583                                         goto rebind;
 584                                 }
 585                         }
 586                         break;
 587
 588                 default:
 589                         rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 590                                         NULL, NULL, NULL, NULL, 1 );
 591                         if ( rc == LDAP_SUCCESS ) {
 592                                 rc = slap_map_api2result( rs );
 593                         }
 594                         break;
 595                 }
 596
 597         } else {
 598                 rs->sr_err = rc;
 599                 rc = slap_map_api2result( rs );
 600         }
 601
 602         rs->sr_err = rc;
 603         if ( rc != LDAP_SUCCESS && ( sendok & LDAP_BACK_SENDERR ) ) {
 604                 send_ldap_result( op, rs );
 605         }
 606
 607         return rc;
 608 }
 609
 610 /*
 611  * meta_back_dobind
 612  */
 613 int
 614 meta_back_dobind(
 615         Operation               *op,
 616         SlapReply               *rs,
 617         metaconn_t              *mc,
 618         ldap_back_send_t        sendok )
 619 {
 620         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 621
 622         int                     bound = 0,
 623                                 i,
 624                                 isroot = 0;
 625
 626         SlapReply               *candidates = meta_back_candidates_get( op );
 627
 628         if ( be_isroot( op ) ) {
 629                 isroot = 1;
 630         }
 631
 632         Debug( LDAP_DEBUG_TRACE,
 633                 "%s meta_back_dobind: conn=%ld%s\n",
 634                 op->o_log_prefix,
 635                 LDAP_BACK_PCONN_ID( mc->mc_conn ),
 636                 isroot ? " (isroot)" : "" );
 637
 638         ldap_pvt_thread_mutex_lock( &mc->mc_mutex );
 639
 640         /*
 641          * all the targets are bound as pseudoroot
 642          */
 643         if ( mc->mc_authz_target == META_BOUND_ALL ) {
 644                 bound = 1;
 645                 goto done;
 646         }
 647
 648         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 649                 metatarget_t            *mt = &mi->mi_targets[ i ];
 650                 metasingleconn_t        *msc = &mc->mc_conns[ i ];
 651                 int                     rc;
 652                 char                    *rootdn = NULL;
 653
 654                 /*
 655                  * Not a candidate
 656                  */
 657                 if ( candidates[ i ].sr_tag != META_CANDIDATE ) {
 658                         continue;
 659                 }
 660
 661                 assert( msc->msc_ld != NULL );
 662
 663                 /*
 664                  * If the target is already bound it is skipped
 665                  */
 666                 if ( LDAP_BACK_CONN_ISBOUND( msc ) || LDAP_BACK_CONN_ISANON( msc ) ) {
 667                         ++bound;
 668                         continue;
 669                 }
 670
 671                 if ( isroot && !BER_BVISNULL( &mi->mi_targets[ i ].mt_pseudorootdn ) )
 672                 {
 673                         Operation       op2 = *op;
 674
 675                         op2.o_tag = LDAP_REQ_BIND;
 676                         op2.o_req_dn = mi->mi_targets[ i ].mt_pseudorootdn;
 677                         op2.o_req_ndn = mi->mi_targets[ i ].mt_pseudorootdn;
 678                         op2.orb_cred = mi->mi_targets[ i ].mt_pseudorootpw;
 679                         op2.orb_method = LDAP_AUTH_SIMPLE;
 680
 681                         rootdn = mi->mi_targets[ i ].mt_pseudorootdn.bv_val;
 682
 683                         rc = meta_back_single_bind( &op2, rs, mc, i, 0 );
 684
 685                 } else {
 686                         rc = meta_back_single_dobind( op, rs, mc, i,
 687                                 LDAP_BACK_DONTSEND, mt->mt_nretries, 1 );
 688                 }
 689
 690                 if ( rc != LDAP_SUCCESS ) {
 691                         char            buf[ SLAP_TEXT_BUFLEN ];
 692
 693                         snprintf( buf, sizeof( buf ),
 694                                 "meta_back_dobind[%d]: (%s) err=%d.",
 695                                 i, rootdn ? rootdn : "anonymous", rc );
 696                         Debug( LDAP_DEBUG_ANY,
 697                                 "%s %s\n",
 698                                 op->o_log_prefix, buf, 0 );
 699
 700                         /*
 701                          * null cred bind should always succeed
 702                          * as anonymous, so a failure means
 703                          * the target is no longer candidate possibly
 704                          * due to technical reasons (remote host down?)
 705                          * so better clear the handle
 706                          */
 707                         /* leave the target candidate, but record the error for later use */
 708                         candidates[ i ].sr_err = rc;
 709                         if ( META_BACK_ONERR_STOP( mi ) ) {
 710                                 bound = 0;
 711                                 goto done;
 712                         }
 713                         continue;
 714                 } /* else */
 715
 716                 Debug( LDAP_DEBUG_TRACE,
 717                         "%s meta_back_dobind[%d]: "
 718                         "(%s)\n",
 719                         op->o_log_prefix, i,
 720                         rootdn ? rootdn : "anonymous" );
 721
 722                 if ( rootdn ) {
 723                         LDAP_BACK_CONN_ISBOUND_SET( msc );
 724                 } else {
 725                         LDAP_BACK_CONN_ISANON_SET( msc );
 726                 }
 727                 ++bound;
 728         }
 729
 730 done:;
 731         ldap_pvt_thread_mutex_unlock( &mc->mc_mutex );
 732
 733         Debug( LDAP_DEBUG_TRACE,
 734                 "%s meta_back_dobind: conn=%ld bound=%d\n",
 735                 op->o_log_prefix, LDAP_BACK_PCONN_ID( mc->mc_conn ), bound );
 736
 737         if ( bound == 0 ) {
 738                 meta_back_release_conn( op, mc );
 739
 740                 if ( sendok & LDAP_BACK_SENDERR ) {
 741                         if ( rs->sr_err == LDAP_SUCCESS ) {
 742                                 rs->sr_err = LDAP_BUSY;
 743                         }
 744                         send_ldap_result( op, rs );
 745                 }
 746         }
 747
 748         return( bound > 0 );
 749 }
 750
 751 /*
 752  * meta_back_default_rebind
 753  *
 754  * This is a callback used for chasing referrals using the same
 755  * credentials as the original user on this session.
 756  */
 757 static int
 758 meta_back_default_rebind(
 759         LDAP                    *ld,
 760         LDAP_CONST char         *url,
 761         ber_tag_t               request,
 762         ber_int_t               msgid,
 763         void                    *params )
 764 {
 765         metasingleconn_t        *msc = ( metasingleconn_t * )params;
 766
 767         return ldap_sasl_bind_s( ld, msc->msc_bound_ndn.bv_val,
 768                         LDAP_SASL_SIMPLE, &msc->msc_cred,
 769                         NULL, NULL, NULL );
 770 }
 771
 772 /*
 773  * FIXME: error return must be handled in a cleaner way ...
 774  */
 775 int
 776 meta_back_op_result(
 777         metaconn_t      *mc,
 778         Operation       *op,
 779         SlapReply       *rs,
 780         int             candidate )
 781 {
 782         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 783
 784         int                     i,
 785                                 rerr = LDAP_SUCCESS;
 786         char                    *rmsg = NULL,
 787                                 *rmatch = NULL;
 788         const char              *save_rmsg = NULL,
 789                                 *save_rmatch = NULL;
 790         void                    *rmatch_ctx = NULL;
 791
 792         if ( candidate != META_TARGET_NONE ) {
 793                 metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 794
 795                 rs->sr_err = LDAP_SUCCESS;
 796
 797                 ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
 798                 if ( rs->sr_err != LDAP_SUCCESS ) {
 799                         /*
 800                          * better check the type of error. In some cases
 801                          * (search ?) it might be better to return a
 802                          * success if at least one of the targets gave
 803                          * positive result ...
 804                          */
 805                         ldap_get_option( msc->msc_ld,
 806                                         LDAP_OPT_ERROR_STRING, &rmsg );
 807                         if ( rmsg != NULL && rmsg[ 0 ] == '\0' ) {
 808                                 ldap_memfree( rmsg );
 809                                 rmsg = NULL;
 810                         }
 811
 812                         ldap_get_option( msc->msc_ld,
 813                                         LDAP_OPT_MATCHED_DN, &rmatch );
 814                         if ( rmatch != NULL && rmatch[ 0 ] == '\0' ) {
 815                                 ldap_memfree( rmatch );
 816                                 rmatch = NULL;
 817                         }
 818
 819                         rerr = rs->sr_err = slap_map_api2result( rs );
 820
 821                         Debug(LDAP_DEBUG_ANY,
 822                                         "==> meta_back_op_result: target"
 823                                         " <%d> sending msg \"%s\""
 824                                         " (matched \"%s\")\n",
 825                                         candidate, ( rmsg ? rmsg : "" ),
 826                                         ( rmatch ? rmatch : "" ) );
 827                 }
 828
 829         } else {
 830                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
 831                         metasingleconn_t        *msc = &mc->mc_conns[ i ];
 832                         char                    *msg = NULL;
 833                         char                    *match = NULL;
 834
 835                         rs->sr_err = LDAP_SUCCESS;
 836
 837                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
 838                         if ( rs->sr_err != LDAP_SUCCESS ) {
 839                                 /*
 840                                  * better check the type of error. In some cases
 841                                  * (search ?) it might be better to return a
 842                                  * success if at least one of the targets gave
 843                                  * positive result ...
 844                                  */
 845                                 ldap_get_option( msc->msc_ld,
 846                                                 LDAP_OPT_ERROR_STRING, &msg );
 847                                 if ( msg != NULL && msg[ 0 ] == '\0' ) {
 848                                         ldap_memfree( msg );
 849                                         msg = NULL;
 850                                 }
 851
 852                                 ldap_get_option( msc->msc_ld,
 853                                                 LDAP_OPT_MATCHED_DN, &match );
 854                                 if ( match != NULL && match[ 0 ] == '\0' ) {
 855                                         ldap_memfree( match );
 856                                         match = NULL;
 857                                 }
 858
 859                                 rs->sr_err = slap_map_api2result( rs );
 860
 861                                 Debug(LDAP_DEBUG_ANY,
 862                                                 "==> meta_back_op_result: target"
 863                                                 " <%d> sending msg \"%s\""
 864                                                 " (matched \"%s\")\n",
 865                                                 i, ( msg ? msg : "" ),
 866                                                 ( match ? match : "" ) );
 867
 868                                 /*
 869                                  * FIXME: need to rewrite "match" (need rwinfo)
 870                                  */
 871                                 switch ( rs->sr_err ) {
 872                                 default:
 873                                         rerr = rs->sr_err;
 874                                         if ( msg != NULL ) {
 875                                                 if ( rmsg ) {
 876                                                         ldap_memfree( rmsg );
 877                                                 }
 878                                                 rmsg = msg;
 879                                                 msg = NULL;
 880                                         }
 881                                         if ( match != NULL ) {
 882                                                 if ( rmatch ) {
 883                                                         ldap_memfree( rmatch );
 884                                                 }
 885                                                 rmatch = match;
 886                                                 match = NULL;
 887                                         }
 888                                         break;
 889                                 }
 890
 891                                 if ( msg ) {
 892                                         ldap_memfree( msg );
 893                                 }
 894
 895                                 if ( match ) {
 896                                         ldap_memfree( match );
 897                                 }
 898                         }
 899                 }
 900         }
 901
 902         rs->sr_err = rerr;
 903         if ( rmsg != NULL ) {
 904                 save_rmsg = rs->sr_text;
 905                 rs->sr_text = rmsg;
 906         }
 907         if ( rmatch != NULL ) {
 908                 struct berval   dn, pdn;
 909
 910                 ber_str2bv( rmatch, 0, 0, &dn );
 911                 if ( dnPretty( NULL, &dn, &pdn, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
 912                         ldap_memfree( rmatch );
 913                         rmatch_ctx = op->o_tmpmemctx;
 914                         rmatch = pdn.bv_val;
 915                 }
 916                 save_rmatch = rs->sr_matched;
 917                 rs->sr_matched = rmatch;
 918         }
 919         send_ldap_result( op, rs );
 920         if ( rmsg != NULL ) {
 921                 ber_memfree( rmsg );
 922                 rs->sr_text = save_rmsg;
 923         }
 924         if ( rmatch != NULL ) {
 925                 ber_memfree_x( rmatch, rmatch_ctx );
 926                 rs->sr_matched = save_rmatch;
 927         }
 928
 929         return ( ( rerr == LDAP_SUCCESS ) ? 0 : -1 );
 930 }
 931